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Planar tri-mode cavity

Inactive Publication Date: 2011-07-07
BAE SYST INFORMATION & ELECTRONICS SYST INTERGRATION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Tri-mode cavities are often large, heavy, and expensive to manufacture.
Additionally, this decrease in size required for the tri-mode cavity to function at higher GHz levels necessitates more rigorous tolerances, and these tolerances make previous designs prohibitively, expensive to manufacture.

Method used

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  • Planar tri-mode cavity
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  • Planar tri-mode cavity

Examples

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Embodiment Construction

[0034]FIG. 1 illustrates the preferred embodiment of a planar tri-mode cavity 106 operating in a beamforming system 100. The system 100 receives a radio frequency (RF) signal 102 at a power divider 104 where it is partitioned into levels to excite the appropriate nodes at the planar tri-mode cavity 106. The planar tri-mode cavity 106 provides a tapered amplitude aperture distribution to a commutator assembly 108 phase shifts, switches and then provides a commutated signal to an antenna array 110. The antenna array 110 generates and transmits an electromagnetic beam based, at least in part, on the commutated signal. By reciprocity, the array can also receive a signal in its formed beam 112 and send the signals to a receiver 102. Henceforth, it will be understood that this beamformer and its components can both receive and transmit signals although the system is described in transmit terms only.

[0035]In the preferred embodiment, the shape of the center of the planar tri-mode cavity 10...

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Abstract

A system and method for distributing the power of an electromagnetic signal is presented. In one embodiment, a power distribution cavity includes, a planar cavity, input ports and output ports. The planar cavity is formed with a metallic sheet in the shape of a star pattern with a plurality of elongated star arms extending from a round center portion of the metallic sheet. The input ports are attached to the round center portion of the metallic sheet for receiving an input signal. The signals entering the cavity from the input ports creating independent resonant modes within the cavity that combine producing a tapered aperture distribution of signals at the output ports. The output ports are attached near to the outward ends of the elongated star arms. The planar cavity is thus configured to propagate electromagnetic fields at the output ports that were excited within the cavity by the input ports.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority from U.S. Provisional Application Ser. No. 61 / 293,028 filed Jan. 7, 2010; the disclosure of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]The current invention relates generally to apparatus, systems and methods for the transmission and reception of electromagnetic waves. More particularly, the apparatus systems and methods transmit and receive electromagnetic waves with an array of antennas. Specifically, the apparatus, systems and methods provide for transmitting or receiving electromagnetic waves based on signals combined coherently by the planar tri-mode cavity.[0004]2. Description of Related Art[0005]Beamforming is a signal processing technique used in sensor arrays for directional signal transmission or reception. Circular array systems are generally comprised of three major parts: 1) the beamformer, 2) the commutator, and 3) a circular array of...

Claims

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Application Information

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IPC IPC(8): H02J17/00
CPCH02J17/00H02J50/20H02J50/70H02J50/402H02J50/005H01Q3/26
Inventor GILBERT, ROLAND A.BLAZEJ, MICHAEL D.
Owner BAE SYST INFORMATION & ELECTRONICS SYST INTERGRATION INC
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